diff --git a/src/App.vue b/src/App.vue
index aecafc9..5d50caa 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -62,9 +62,24 @@ onMounted(() => {
 <template>
     <router-view v-slot="{ Component }">
         <Suspense>
-            <div>
+            <div class="app-shell">
                 <component :is="Component" />
             </div>
         </Suspense>
     </router-view>
 </template>
+
+<style scoped lang="scss">
+/* 全站最大宽度，桌面端居中；transform 让 position:fixed 相对本容器对齐 */
+.app-shell {
+  width: 100%;
+  max-width: 540px;
+  min-height: 100vh;
+  min-height: 100dvh;
+  margin: 0 auto;
+  position: relative;
+  box-sizing: border-box;
+  overflow-x: hidden;
+  transform: translateZ(0);
+}
+</style>
diff --git a/src/app.css b/src/app.css
index ebb50db..fec32cc 100644
--- a/src/app.css
+++ b/src/app.css
@@ -22,7 +22,8 @@
   top: 50%!important;
   max-width: 100vw!important;
 }
-canvas {
+/* 仅 AR 全屏画布；勿用全局 canvas（会把点云 WebGL 拉成 100vw 导致偏左） */
+.fullscreen-canvas {
   position: fixed;
   left: 0;
   top: 0;
diff --git a/src/app.less b/src/app.less
index 5bf141f..379a231 100644
--- a/src/app.less
+++ b/src/app.less
@@ -1,6 +1,16 @@
+html,
+body {
+  margin: 0;
+  padding: 0;
+  width: 100%;
+  min-height: 100%;
+  background-color: #eff2f5;
+}
+
 #app {
-  // height: 100%;
-  // overflow-x: hidden;
+  width: 100%;
+  min-height: 100vh;
+  min-height: 100dvh;
 }
 
 *,
@@ -37,7 +47,8 @@
   // height: 100vh;
 }
 
-canvas {
+/* 仅 AR 全屏画布；勿用全局 canvas（会把点云 WebGL 拉成 100vw 导致偏左） */
+.fullscreen-canvas {
   position: fixed;
   left: 0;
   top: 0;
diff --git a/src/views/douyin/components/ImagePointCloud.vue b/src/views/douyin/components/ImagePointCloud.vue
index e2de931..b484c4c 100644
--- a/src/views/douyin/components/ImagePointCloud.vue
+++ b/src/views/douyin/components/ImagePointCloud.vue
@@ -389,8 +389,18 @@ onUnmounted(() => {
 }
 
 .ipc-webgl {
+  position: relative !important;
+  left: auto !important;
+  top: auto !important;
+  right: auto !important;
+  bottom: auto !important;
   display: block;
   flex-shrink: 0;
+  /* 覆盖全局/历史 fullscreen canvas 规则，保证正方形居中 */
+  width: auto;
+  height: auto;
+  max-width: 100%;
+  max-height: 100%;
   opacity: 0;
   transition: opacity 1.2s cubic-bezier(0.4, 0, 0.2, 1);
 }
@@ -404,12 +414,13 @@ onUnmounted(() => {
 }
 
 .ipc-scale {
-  position: absolute;
-  width: 1px;
-  height: 1px;
+  position: absolute !important;
+  width: 1px !important;
+  height: 1px !important;
   opacity: 0;
   pointer-events: none;
-  left: -9999px;
+  left: -9999px !important;
+  top: auto !important;
 }
 
 .ipc-fallback {
diff --git a/src/views/douyin/generating.vue b/src/views/douyin/generating.vue
index 29a6602..76832ca 100644
--- a/src/views/douyin/generating.vue
+++ b/src/views/douyin/generating.vue
@@ -28,12 +28,7 @@
                   @handoff="onHandoff"
                 />
               </div>
-              <img
-                v-if="resultUrl"
-                class="stage-layer result-layer"
-                :src="resultUrl"
-                alt=""
-              >
+              <!-- 效果图点云阶段不叠底图，等揭示后再进预览页展示 -->
             </div>
           </div>
           <div v-if="errorTip" class="error-tip">{{ errorTip }}</div>
@@ -154,12 +149,13 @@ const ordering = ref(false)
 const errorTip = ref('')
 const showConfirmModal = ref(false)
 
-/** 红框正方形边长：首屏即算好，不依赖 CSS min() */
+/** 红框正方形边长：按 app-shell 实际宽度算，避免桌面端用整窗宽导致偏大/错位 */
 function calcStageSide() {
   if (typeof window === 'undefined') return 280
-  const w = window.innerWidth || 375
+  const shell = document.querySelector('.app-shell') as HTMLElement | null
+  const w = shell?.clientWidth || Math.min(window.innerWidth || 375, 540)
   const h = window.innerHeight || 667
-  // 约屏宽 72%、屏高 40%，上限 320，贴近预览卡片区域
+  // 约容器宽 72%、屏高 40%，上限 320，贴近预览卡片区域
   return Math.max(180, Math.round(Math.min(w * 0.72, h * 0.4, 320)))
 }
 
@@ -297,24 +293,13 @@ function onHandoff() {
 }
 
 function startSoftProgress() {
+  // 固定节奏：每 300ms +1%，效果图就绪后冲到 96%，预览前再动画到 100%
   softTimer = setInterval(() => {
     if (showResult.value) return
-    // 效果图已到：快速冲到 96%，留给揭示动画收尾到 100%
-    if (resultUrl.value) {
-      if (progress.value < 96) {
-        progress.value = Math.min(96, progress.value + 3.2)
-      }
-      return
-    }
-    const cap = config.poll.softCap
+    const cap = resultUrl.value ? 96 : config.poll.softCap
     if (progress.value >= cap) return
-    // 整体加快：前段更快，后段仍有余量
-    let step = 2.4
-    if (progress.value >= 35) step = 1.4
-    if (progress.value >= 60) step = 0.85
-    if (progress.value >= 75) step = 0.45
-    progress.value = Math.min(cap, progress.value + step)
-  }, 280)
+    progress.value = Math.min(cap, progress.value + 1)
+  }, 300)
 }
 
 function startMaskFetch() {
@@ -516,7 +501,7 @@ onUnmounted(() => {
   flex-direction: column;
   align-items: center;
   width: max-content;
-  max-width: calc(100vw - 32px);
+  max-width: calc(100% - 32px);
 }
 
 .stage-shell {
@@ -545,14 +530,6 @@ onUnmounted(() => {
   height: 100% !important;
 }
 
-.result-layer {
-  object-fit: contain;
-  opacity: 0.35;
-  z-index: 2;
-  pointer-events: none;
-  background: transparent;
-}
-
 .error-tip {
   margin-top: 12px;
   max-width: 280px;
diff --git a/src/views/douyin/index.vue b/src/views/douyin/index.vue
index 41e4598..844402d 100644
--- a/src/views/douyin/index.vue
+++ b/src/views/douyin/index.vue
@@ -211,6 +211,10 @@ async function onSubmit() {
 }
 
 onMounted(() => {
+  // 清理历史本地标记（锁定状态改为仅看 orders/stat）
+  try {
+    sessionStorage.removeItem('douyin_order_submitted')
+  } catch (_) {}
   getOrderStat()
   // 预采样 Logo 点云，进入等待页可立刻上屏
   preloadLogoCloud().catch(() => {})
diff --git a/src/views/douyin/records.vue b/src/views/douyin/records.vue
index 7198122..2888329 100644
--- a/src/views/douyin/records.vue
+++ b/src/views/douyin/records.vue
@@ -91,7 +91,7 @@
 </template>
 
 <script setup lang="ts">
-import { computed, onUnmounted, reactive, ref } from 'vue'
+import { computed, onMounted, onUnmounted, reactive, ref } from 'vue'
 import { useRouter } from 'vue-router'
 import * as douyinApi from '@/api/douyin'
 import { douyinConfig as config } from '@/config/douyin'
@@ -227,6 +227,14 @@ function onCardClick(item: any) {
   }
 }
 
+onMounted(() => {
+  // 桌面端 / 非移动调试模式下 van-list immediate-check 可能不触发，主动拉首屏
+  if (!initialLoaded.value && !fetching.value) {
+    loading.value = true
+    onLoad()
+  }
+})
+
 onUnmounted(() => {
   loading.value = false
   finished.value = false